Reference plate



FIG. 1 is a front view of a reference plate, showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a reference view thereof; as shown along line 7-7 in the cross sectional view of the reference plate of FIG. 1.

The broken lines in the drawings depict unclaimed environmental subject matter.

The reference plate of this design is used in a heat exchanger manufacturing apparatus, the reference plate being installed in a heat exchanger manufacturing apparatus such that the reference plate can control a moving distance of a reciprocating plate relative to an end plate of a heat exchanger. 

CLAIM The ornamental design for a reference plate, substantially as shown and described. 